共50条信息
已知\(f(x)\)是定义在\(R\)上的周期为\(2\)的函数,当\(x∈(-1,1]\)时,\(f(x)=\begin{cases} -4x^{2}+ \dfrac{9}{8},-1 < x\leqslant 0, \\ \log _{2}x,0 < x\leqslant 1, \end{cases}\),则\(f(f( \dfrac{7}{2}))=\)________.
已知\(f_{1}(x)=\sin x+\cos x\),\(f_{n+1}(x)\)是\(f_{n}(x)\)的导函数,即\(f_{2}(x)=f_{1}′(x)\),\(f_{3}(x)=f_{2}′(x)\),\(…\),\(f_{n+1}(x)=f_{n}′(x)\),\(n∈N^{*}\),则\(f_{2017}(x)=(\) \()\)
已知\(
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